<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
              <el-tag closable @close="removeRolesById(scope.row,item1.id)">  {{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限和三级权限  -->
               <el-col :span="19">

                 <!-- 通过for循环嵌套渲染二级权限 -->
                 <el-row :class =" [i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                   <el-col :span="6">
                     <el-tag type="success" closable @close="removeRolesById(scope.row,item2.id)">
                       {{item2.authName}}
                     </el-tag>
                     <i class="el-icon-caret-right"></i>
                   </el-col>
                     <el-col :span="18">
                       <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRolesById(scope.row,item3.id)" >
                         {{item3.authName}}
                       </el-tag>
                     </el-col>
                 </el-row>

                 </el-col> 

            </el-row>


            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>

        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" align="center"></el-table-column>
        <el-table-column label="角色名称" prop="roleName" align="center"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc" align="center"></el-table-column>
        <el-table-column label="操作" width="300px" align="center">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)">编辑</el-button>
            <!-- 删除按钮 -->
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
            <!-- 分配权限按钮 -->
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRolesVisible"
      width="40%"
      @close="addDialogClosed"
      center
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRoles"
        ref="addFormRef"
        label-width="90px"
        status-icon
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="addRoles">确 定</el-button>
        <el-button @click="addRolesVisible = false" style="margin-left:20%">取 消</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="40%" @close="editDialogColsed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="90px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="40%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree 
  :data="rightslist"
   :props="treeProps"
   show-checkbox 
   node-key="id" 
   default-expand-all	
   :default-checked-keys="defKeys" 
   ref="treeRef"></el-tree>
 
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      
      //控制添加对话框的显示与隐藏
      addRolesVisible: false,

      //控制分配权限对话框显示与隐藏
      setRightDialogVisible:false,
      //所有权限的数据
      rightslist: [],

      //树形控件的绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      //权限列表中默认选中的节点Id值
      defKeys:[],

      //即将分配权限的角色id值
      roleId:'',

      //添加角色的表单数据
      addForm: {
        roleName: "",
        roleDesc: ""
      },
      //添加角色的验证规则
      addFormRoles: {
        roleName: [
          {
            required: true,
            message: "请输入角色名称",
            trigger: "blur"
          },
          {
            min: 3,
            max: 10,
            message: "角色名称的长度在3-10个字符之间",
            trigger: "blur"
          }
        ],
        roleDesc: [
          {
            required: true,
            message: "请输入角色描述",
            trigger: "blur"
          }
        ]
      },
      //控制修改角色的对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的角色信息对象
      editForm: {},

      //编辑角色的验证规则
      editFormRules: {
        roleName: [
          {
            required: true,
            message: "请输入角色名称",
            trigger: "blur"
          },
          {
            min: 2,
            max: 10,
            message: "角色名称的长度在2-10个字符之间",
            trigger: "blur"
          }
        ],

        roleDesc: [
          {
            required: true,
            message: "请输入角色描述",
            trigger: "blur"
          }
        ]
      }
    };
  },
  created() {
    this.getRoleslist();
  },
  methods: {
    //获取所有角色列表
    async getRoleslist() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }

      this.rolelist = res.data;

      console.log(this.rolelist);
    },
    //监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //点击按钮，添加新角色
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        //可以发起添加用户的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);

        if (res.meta.status !== 201) {
          this.$message.error("添加角色失败！");
        }

        this.$message.success("添加角色成功！");
        //隐藏添加角色用户的对话框
        this.addRolesVisible = false;

        //重新获取角色列表数据
        this.getRoleslist();
      });
    },
    //展示编辑角色对话框
    async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("查询角色信息失败");
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听角色修改对话框的关闭事件
    editDialogColsed() {
      this.$refs.editFormRef.resetFields();
    },

    //修改角色信息并提交
    editRolesInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        //发起修改角色的数据请求
        const{ data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        );
        // 打印请求数据id请求 
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error("更新角色信息失败！");
        }

        //关闭对话框
        this.editDialogVisible = false;
        //刷新数据列表
        this.getRoleslist();
        //提示修改成功
        this.$message.success("更新角色信息成功！");
      });
    },
    //根据id删除对应的jues
    async removeRolesById(id){
        //弹框询问用户是否删除数据
       const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        //如果用户确认删除，则返回值为字符串 confirm
        //如果用户取消删除，则返回值为字符串 cancel
        // console.log(confirmResult)
        if(confirmResult !=='confirm'){
            return this.$message.info('已取消删除')
        }
       const {data:res} = await this.$http.delete('roles/' + id)
        if(res.meta.status !==200){
            return this.$$message.error('删除角色失败！')
        }
        this.$message.success('删除角色成功！')
        this.getRoleslist()
    },
    //根据ID删除对应的权限
    async removeRolesById(role,rightId){
      //弹框提示用户是否要删除
     const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !=='confirm'){
          return this.$message.info('取消了删除！')
        }

      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if(res.meta.status !==200){
        return this.$message.error('删除权限失败！')
      }

      // this.getRoleslist()
      role.children = res.data
   },
   //展示分配权限的对话框
   async showSetRightDialog(role){

     this.roleId = role.id
     //获取所有权限的数据
    const{data:res} = await this.$http.get('rights/tree')
    
      if(res.meta.status !==200){
        return this.$message.error('获取权限数据失败！')
      }
      //获取到的权限数据保存到data中
      this.rightslist  = res.data
      console.log(this.rightslist)

      //递归获取三级节点的Id
      this.getLeafKeys(role,
      this.defKeys)

      //定义展开树形结构对话框
     this.setRightDialogVisible = true

   },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys数组中
    getLeafKeys(node,arr){
      //如果当前node 节点不包含Children属性，则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }

    node.children.forEach(item => 
    this.getLeafKeys(item, arr))

    },
  //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys = []
    },

      //为角色分配权限
   async allotRights(){
      const keys = [
        ...this.$refs.treeRef.
        getCheckedKeys(),
        ...this.$refs.treeRef.
        getHalfCheckedKeys()
      ]

      const idstr = keys.join(',')

    const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idstr})

    if(res.meta.status !==200){
      return this.$message.error('分配权限失败！')
    }

    //分配权限成功后提示消息
    this.$message.success('分配权限成功！')
    
    //刷新权限列表
    this.getRoleslist()

    //关闭权限对话框
    this.setRightDialogVisible = false 
    }

  }
};
</script>
<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top:1px solid #eeeeee;
}
.bdbottom{
  border-bottom:1px solid #eeeeee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>